Electric signal.



J. LIEVRE. ELECTRIC SIIGNAL.

APPLl CATl0N FILED FEB. 5. 1915,

m Mom JESEPH A/'l RE UNITED STATES JOSEPH LIEVIR'E, OF CORPUS CHRISTI,TEXAS.

ELECTRIC SIGNAL.

Specification of Letters Patent.

Patented June 1, 1915.

Application filed February 5, 1915. $eria1No. 6,327.

To (ZZZ whom it may concern Be it known that l, JOSEPH Lnivnn, a citizenof France, residing at Corpus Christi, in the county of Nueoes and Stateof Texas, have invented certain new and useful Improvements in ElectricSignals, of which the following is a specification.

The present invention relates to improve ments in electric signals, andis designed particularly for the purpose of providing an alarm orindicator especially adapted for use in connection with motors such asinternal combustion engines.

The primary object of the invention is the provision of an electricallyoperated signal alarm adapted to be attached to the internal combustionengine in order to en ergize an alarm device in case the temperature ofthe water in the water jacket of the 'motor is excessive.

The invention consists in the adaptation of the principles of thethermostat to the water jacket of the engine casing in such manner thatwhen a predetermined temperature is reached the signal will beelectrically operated.

While shall hereinafter refer. to the invention as applied to anautomobile motor or internal combustion engine, it will of course beunderstood that the invention is equally applicable for use in other'connections to indicate predetermined temperature in water, air, andother fluids.

in the accompanying drawings 1 have illustrated one complete example ofthe physical embodiment of my invention constructcd accoirling to thebest mode I have so far devised for the practical applies tion of theprinciples of my invention.

Figure l is a side elevation of the device applied to the water jacketof an internal combustion engine and dia 'rammatically indicating; theelectrical connections. Fig. 2 is an enlarged sectional detail viewshowing the connection of the thermostat with the engine casing. Fig. 3is a detail view partly broken away and partly in section showing theelectrical conductors and connections of the thermostat.

ln the preferred embodiment of the in vention illustrated i thedrawingthe device 'cted upon the water jacket or c pal con'ilnistionengine. u 'lnch in t by the numeral 1. This jacket is threaded at 2, andthe threaded opening is adapted receive the hollow screw plug 3, whichhas a tapered screw threaded portion 4 adapted to fit in the threads 2of the casing 1. This screw plug is hollow as indicated in Fig. 2, andhas a tapered bore 5, and an enlarged counter bored threaded portion 6.The tapered bore 5 is adapted to form a seat for the lower end 7 of abulb 8, and the bulb is provided with exterior teeth 9 that are threadedinto the teeth of the counter bore 6. A head 10 is provided for thebulb, and it will be seen that the screw plug 3 may be screwed up on thethreaded bulb against the head 10. This bulb is preferably of glass, andis provided with an integral stem 11 which, as seen is Fig. 1, is spiralshaped in order to form a compact thermostat which may be applied to theinternal combustion engine, and not occupy excessive space. The stem 11has a bore 12 extending approximately throughout its lengtln and thisbore is adapted to form a path for the mercury which rises from the bulb8.

Spaced at regular intervals throughout the length of the stem 11, are aseries of rings 13 preferably of platinum, and these rings as best seenin Fig. 3, are embedded in the glass of the stem and project slightlybeyond the periphery of the circular glass stem. Each of these platinumrings or hands is provided with a plurality of conductors 14, and theseconductors which are in the form of pins project inwardly from theplatinum ring through the glass stem and into the bore 12 of the stem.'lhesc platinum rings, as before stated, are spaced at regularintervals. and the stem between the rings is marked or divided intospaces to indicate degrees of temperature as is usual on thermostats.Near the head 10 of the bulb a special ring 15 is embedded in thematerial oi the stem and is provided with the usual conductors 14, andthis ring is connected hv a wire 16 to the metal of the water jacket 5as shown in Figs. 1 and 2.

in Fig. 1. I have illustrated two sliding sleeves as 17 and 18, whichare adapted to he moved on the stem 11. One of these sleeves as 17. hasa wire 19 leading there from. and a bell Q0. and this wire 19 isconnected to the water jacket 1 by the return wire 2i. The other sleeve18 has a wire 22 connected therctoand a lamp and this wire also isconnected to the return wire 21.

It will be noted that the end 7 of the bulb 8 projects beyondthematerial of the screw plug, and in the case of a Water jacket, this endof the bulb will be in actual contact with the Water. Thus, should thewater attain excessively high temperature or become unduly heated, themercury Will rise from the bulb 8 and pass around through the bore 12 ofthe stem. The mercury is always up to the level ofthe conductors 14: ofthe ring 15, so that the ring 15 is at all times electrically connectedWith the Water jacket by the Wire 16.

In operation, if it is desired that the lamp 23 shall be lighted as asignal at a predetermined temperature of the Water, and also that thebell 20 shall ring at a predetermined higher temperature, as the heat ofthe Water adjacent the bulb 8 rises, the mercury rises in the stem untilit contacts with the con ductors 14 on the rings 13 under the sleeve 18.The circuit is noW complete through the mercury, the conductors 14, thering 13, sleeve 18, Wire 22, the lamp 23 is lighted, and the circuit iscompleted through the wire 21, the Water jacket 1, Wire 16, and ring 15with its conductors 1 1. Should the temperature of the Water reach thepredetermined height corresponding to that at which the sleeve 17 isset, the bell 20 is rung through the circuit "as completed through Wires19 and 21.

The lamp 23 or bell 20., or both of them are mounted on the dash oftheautomobile to which the motor is applied in position so that they canbe seen or heard with facility by the occupant of the car, and wheneither or both of these signals is energized. they will give due noticeto the occupant of the car of the existing conditions.

1 claim:

The combination with the motor Water jacket, of a hollow screw plughaving a seat for a bulb therein, and screwed on to said bulb, saidbulbhaving an elongated stem With a bore therein and mercury in said bulband bore, conductors and conductor rings spaced throughout the length ofsaid stem, a me tallic sleeve slidable on the stem adapted to co-actwith one of said rings, and an electric circuit including an alarm fromsaid sleeve to the metal of the Water jacket and to an other point onthe stem, substantially as de scribed.

In testimony whereof I a'liii: my signature in presence of twoWitnesses.

JOE LIEVRE. Witnesses:

EDW. F. GLAss,

L. C. Wishes.

